Elektra Beckum NM20600A-A User Manual
Selecting the head model
MCE User’s Guide
10
2004-05-17
NM20600A-A
Table 1
Properties of the point sets
4.3 Creating BEM files
If you have MR images of the subject, you can create fif-files describing boundary
element models of the brain with MriLab and meshes2fiff programs. See the manu-
als of those programs (or Source Modeling manual) for details of using those pro-
grams.
element models of the brain with MriLab and meshes2fiff programs. See the manu-
als of those programs (or Source Modeling manual) for details of using those pro-
grams.
When creating the meshes in Mrilab, you must save them in head coordinates
in meters.
in meters.
Warning: The triangle meshes used in MCE to describe the shape of the brain
must be defined in head coordinates. This differs from the recommended coordi-
nate system usage in dipole modeling program.
must be defined in head coordinates. This differs from the recommended coordi-
nate system usage in dipole modeling program.
Origin: xyz
Sphere model origin (in mm; head coordinates)
Lattice
The density of the points in the point set (in mm)
Min dist
The minimum distance to the sphere model origin (in
mm). Points deeper than this are excluded from the
point set. Very deep source points may lead to numer-
ical instability in the calculations.
mm). Points deeper than this are excluded from the
point set. Very deep source points may lead to numer-
ical instability in the calculations.
Comment
The comment seen in the list
Points
The number of possible source points
!